CheckIP Tool

Dyn offers a free web IP detection tool for use with DynDNS services. CheckIP will return the remote socket’s IP address. If a client sends a Client-IP or a X-Forwarded-For HTTP header, CheckIP will return that value instead.

Hostname:checkip.dyndns.org

HTTP ports:80, 8245

Call and Answer

CheckIP responds to valid HTTP requests for http://checkip.dyndns.com/. A valid request will result in the following sample response: